I recently read in the news that Yaz is under fire and pending a class action lawsuit because "Yaz is the only pill that has a 24/4 dosing schedule and contains the synthetic hormone drosperinone", and many people have been developing blood clots. "Women who take contraceptive pills containing drospirenone have a six- to sevenfold risk of developing thromboembolism compared to women who do not take any contraceptive pill, and twice the risk of women who take a contraceptive pill containing levonorgestrel."
Whatever its advertised benefits, it's not worth the extra risk.